Elevator safety-contact



J. M, COOTE. ELEVATOR SAFETY CONTACT1 APPLICATION FILED 050.24, 1918;

Patetated Sept. 21, 1920..

nlinlhuhnl l N VE N TOR. J/lla/ we! 62' ATTORNEY UNITED STATES PATENT OFFICE.

JOHN MAXNELL OOOIE, OF ELIZABETH, NEW JERSEY.

ELEVATOR SAFETY-CONTACT.

Application filed December 24, 1918.

To all whom it may concern:

lie it known that l, JOHN MAXWELL Coors; a citizen of the United States, and a resident of Elizabeth, in the county of Union and" State of n ew Jersey, have invented CQIllfLlIL vided to prevent a passenger from leaving or entering the car; and more particularly to means for positively insuring, by me chanical means, the breaking of the actuat ing current circuit. In accordance with the present invention, this is efiected through the as the well-known spring controlled hand rod.

In the accompanying drawings, 'which illustrate the invention- V v Figure 1 is a fragmentary elevation showing the respective members in their proper relationship when the door is locked.

Fig. 2 is a fragmentary end View.

Similar characters of reference designate corresponding parts throughout the several views.

Referring to the drawings, 10 designates a suitable casing adapted to be secured to a wall or floor 11 surrounding the elevator shaft. (notshown) and contains contact mechanism-for example, of the character set forth in "a prior Patent No. 1,277,868, granted to me the 3rd day of September, 1918. In the contact mechanism aforesaid, the contact is broken under the action of resilient means and through gravity. l/Vhile these same forces are employed in the present device, the action is further positively insured by mechanical means which will doubly safeguard the operation of the elevator. The contact mechanism referred to may consist of a contact block 12 providing a curved surface 13 opposite the free end 14 of a spring member 15 secured at one end to the casing 10. To the spring is also attached an inward extension 16 of an arm 17 movably secured to the casin The arm carries, also, a link 18 which is projected outwardly through a slot 19 of the casing 10 substantially in the axis of the arm 17. Beyond the casing 10, link 18 is provided with a pin 20 Specification of Letters Patent.

Patented Sept. 21, 1920.

Serial No. 268,190.

iprojccting perpendicularly therefrom into a "slot 21 of the weighted arm 22 of a lever pivoted to the wall 11. The other arm of is lever is provided with a latch 23 adapted to engage with a catch 24 secured to a plate 30 which, in turn, is carried by the door I? he plate 30 carries, also, alever whose inner end extends beyond and behind the sprlng- 'ged hand rod 32 of well-known construction and designed to unlock the gate. For =.lS purpose, the said rod 32 carries a pm pro ecting perpendicularly therefrom oackwardly over the arm 31 and is designed 1J0 engage with its upper surface to depress the arm to the dotted pos1t1on lndicated,

I when the said rod 32 is drawn downwardly to release the gate. The other arm of the -..ieve1' is provided with a nose 34: which, when operation of the said door or gate, or rather- [the said rod 32 is drawn downwardly, as the unlocking instrumentallty thereof, such aforesaid, engages the under-surface 35 of {the latch 23 to throw same upwardly to the i position indicated in dotted lines, and correspondingly depresses, to the position indicated in dotted lines, the arm 22. This latter arm, through the pin and slot connection 28 and 21, will draw link 18 outwardly to l he contact at the surface 13 and end thus prevent the operation of the elexatcr so long as the gate is unlocked or open. Arm 22, being constructed relatively heavy, gravity will also assist in effecting this break in the circuit, but the same is positively insured through the operation of the nose against the latch 23, the motion of which nose serves, also, to release the latch 23 from its catch 24 and thus permit the door to be opened by moving in the direction indicated by the arrow.

To restore the contact, and render the current available for operation of the ele vator driving mechanism (not shown), the upper end 36 of rod 32 is arranged to bear against the lower surface 37 of the arm 22, and tans positively force the same upwardly t0 the position indicated in full lines. This restores, also, the locking engagement between latch 23 and catch 2a to lock the said gate, the pin 33, moving upwardly with the rod to permit of the return of nose 3% to its normal position.

-t will be apparent, therefore, that so long as the gate is not properly closed or locked, the electrical contact will be broken between the surface 13 and end 14:, and no current can be supplied to the elevator driving mechanism, obviating any danger from premature starting of same. As soon, however, as the a door is properly closed, thus barring any entry or exit to or from the elevator, the contact has been positively restored, and th operating current is available. 7

I claim: a I

1. In a safety appliance for electrically controlled elevators and the like: a gate, a catch carried by the gate, a contact-making member, a releasing instrumentality, a pivoted latch member, one arm of same being designed to engage the said catch and the other arm connected with said contact-making member, a disengaging lever pivotally carried by the gate, adapted to engage with s'aidlatch member to free the latch from the V catch, and having an arm actuated from said releasing instrumentality whereby when the same is drawn in one direction, the disengaging lever is actuated, said releasing instrumentality beingadapted to engage the contact operating arm of the latch member in the other directionof its movement to restore the locking engagement and to effect a closure of thecontact by the contact-making member. 7 .7

'2.' In a "safety appliance for electrically controlled elevators and the like: a gate, a catch carried by the gate, a contact-making member, a hand 'rod for releasing the elevator gate, a pivoted latch member, one arm of same being designed to engage the said catch and the other 'arm connected with said contact-making member, a disengaging lever pivotallycarried by the gate, adapted to engage with said latch member to free the latch from the catch, and having an arm engaged by a pin projecting fromsa-id hand rod whereby when the same is drawn in one direction,'the disengaging lever is actuated, said'rod being adapted to engage the contact operating arm of the latch member in the other direction of its movement to restorethe locking engagement and to efi'ect a closure of the contact by the contact '7 making member.

Signed at New 3. In a safety appliance for electrically controlled elevators and the like: a gate, a catch carried by the gate, a contact-making member, a hand rod for releasing the elevator gate, a pivoted latch member, one arm of same being designedto engage the said catch and the other arm overba-lancingsaid latch portion and connected with said contact-making member, a disengaging lever pivotally carried by the gate, adapted to engage with said latch member to free the latch from the catch, and having an arm engaged by a pin projecting from said hand rod whereby when the same is drawn in one direction, the disengaging lever is actuated, said rod being adapted to engage the contact operating arm of the latch member in the other direction of its movement 'to restore the locking engagement and to effect a closure of the contact by the contact maln'ng member. 7

at. In a'safety appliance for electrically controlled elevators and'th'e 'likeia'gate, a catch carried by the gate, a movable contact making member, a hand rod for'releasing the elevator gate, a pivoted latch member, one arm of same being designed to engagethe said catch, a link connecting the other arm thereof to-the contact-making the link arm of said latch member in the other direction of its movement to restore the locking engagement and to effect a 010- s'ure of the contact by the contact-making member. 7

York; in the county of: New York and State'of blew York, this-23rd day'of December, A; D. 1918.

JOHN MAXWELL cooTE.

75 member, a disengaging lever pivotally car V 

